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| Pàgina inicial > Articles > Articles publicats > Orbital Hall effect and topology on a two-dimensional triangular lattice : |
| Data: | 2024 |
| Resum: | We investigate a generalized multiorbital tight-binding model on a triangular lattice, a system prevalent in a wide range of two-dimensional materials and particularly relevant for simulating transition metal dichalcogenide monolayers. We show that the interplay between spin-orbit coupling and different symmetry-breaking mechanisms leads to the emergence of four distinct topological phases [Eck, Phys. Rev. B 107, 115130 (2023)2469-995010. 1103/PhysRevB. 107. 115130]. Remarkably, this interplay also triggers the orbital Hall effect with distinguished characteristics. Furthermore, by employing the Landauer-Büttiker formula, we establish that in the orbital Hall insulating phase, the orbital angular momentum is carried by edge states present in nanoribbons with specific terminations. We also show that they do not have the same topological protection against the disorder of the edge states as a first-order topological insulator. |
| Ajuts: | Agencia Estatal de Investigación PID2019-106684GB-I00 Agencia Estatal de Investigación FJC2021-047300-I Agencia Estatal de Investigación PCI2021-122035-2A European Commission 881603 Agencia Estatal de Investigación CEX2021-001214-S |
| Nota: | Altres ajuts: CERCA Programme/Generalitat de Catalunya |
| Drets: | Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets. |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió acceptada per publicar |
| Matèria: | Edge state ; Orbitals ; Spin-orbit couplings ; Symmetry breakings ; Tight-binding modeling ; Topological phase ; Transition metal dichalcogenides (TMD) ; Triangular-lattice ; Two-dimensional ; Two-dimensional materials |
| Publicat a: | Physical review B, Vol. 110, Issue 8 (August 2024) , art. 85412, ISSN 2469-9969 |
Postprint 12 p, 10.2 MB |